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中方接手哈萨克斯坦南图尔盖盆地勘探工作后,为了建立盆地统一的地层划分标准,研究快速而有效的地层对比方法,开展了本次侏罗系旋回地层划分对比研究.在统一的应力作用下沉积地层具有统一或相关的旋回特征,贯穿盆地发生、发展、消亡过程,这种旋回特征是地层对比的基本依据.本次研究以测井曲线旋回趋势分析为基础,通过对侏罗系地层岩性组合特征、测井曲线旋回趋势特征分析,孢粉化石资料标定和地震波组特征约束等方法,实现了全区侏罗系旋回地层划分对比,将侏罗系划分为七个三级旋回层序JSQ1~JSQ7,并建立了研究区等时地层格架,为进一步开展勘探工作奠定基础.该方法操作方便,综合应用地震、测井、钻井地质、古生物等资料,对比结果科学可靠,对盆地地层划分工作具有借鉴意义.
After the Chinese took over the exploration work in the South Turgai Basin in Kazakhstan, in order to establish a uniform standard of stratigraphic division in the basin and study the rapid and effective stratigraphic correlation method, a comparative study on the stratigraphic division of the Jurassic strata was carried out. Under uniform stress The sedimentary strata have uniform or related gyration characteristics, which occur, develop and disappear throughout the basin, and this cycle characteristic is the basic basis of stratigraphic correlation.Based on the analysis of the gyration trend of logging curves, The characteristics of sex assemblage, the analysis of trending trend of log curve, the calibration of sporopollen fossil data and the characteristic constraints of seismic wave group, the division and comparison of the Jurassic cycle strata in the whole area have been realized. The Jurassic system is divided into seven third- JSQ1 ~ JSQ7, and established the isochronal stratigraphic framework in the study area, which laid the foundation for further exploration work.The method is easy to operate and comprehensively applied to the data of seismic, well logging, drilling geology and paleontology, and the results are scientific and reliable. Dividing work has reference significance.